3e SRD:Belt of Dwarvenkind

From D&D Wiki

This belt gives the wearer a +4 competence bonus on all Charisma checks and Charisma-keyed skill checks as they relate to dealing with dwarves, a +2 competence bonus on similar checks when dealing with gnomes and halflings, and a -2 competence penalty on similar checks when dealing with anyone else. The wearer can understand, speak, and read Dwarven. If the wearer is not a dwarf, he or she gains darkvision (range 60 feet), dwarven stonecunning, a +2 enhancement bonus to Constitution, and +2 resistance bonuses against poison, spells, and spell-like effects.